Reversed mode spin torque oscillator with shaped field generation layer

Abstract

The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, an STO disposed between the trailing shield and the main pole, and a non-magnetic conductive structure adjacent to the main pole and in contact with the STO. The STO includes an FGL and an SPL, and the FGL is disposed between the main pole and the SPL. The FGL includes a side extending over the main pole and at least a portion of the non-magnetic conductive structure. With the FGL disposed proximate to the main pole and over at least a portion of the non-magnetic conductive structure, current crowding and disturbance from the trailing shield are minimized.

What is claimed is: 
     
       1. A magnetic recording head, comprising:
 a main pole; 
 a spin torque oscillator in contact with the main pole, wherein the spin torque oscillator comprises a spin polarization layer and a field generation layer disposed between the spin polarization layer and the main pole, wherein the field generation layer includes a surface at a media facing surface, and the surface has a trapezoidal shape, wherein the trapezoidal shape has a first side facing the main pole and a second side facing the spin polarization layer, wherein the first side has a length in a cross-track direction that is greater than a length in the cross-track direction of the second side; and 
 a non-magnetic conductive structure surrounding at least a portion of the main pole, wherein the non-magnetic conductive structure is in contact with the spin torque oscillator. 
 
     
     
       2. The magnetic recording head of  claim 1 , wherein the non-magnetic conductive structure comprises a non-magnetic electrically conductive metal. 
     
     
       3. The magnetic recording head of  claim 2 , wherein the non-magnetic conductive structure further comprises NiTa, Cr, Cu, or Rh. 
     
     
       4. The magnetic recording head of  claim 1 , wherein the spin polarization layer includes a surface at the media facing surface, wherein the surface has a rectangular shape. 
     
     
       5. A data storage device comprising the magnetic recording head of  claim 1 . 
     
     
       6. A magnetic recording head, comprising:
 a main pole; 
 a spin torque oscillator in contact with the main pole, wherein the spin torque oscillator comprises a spin polarization layer and a field generation layer disposed between the spin polarization layer and the main pole, wherein the field generation layer includes a surface at a media facing surface, and the surface has a trapezoidal shape; 
 a non-magnetic conductive structure surrounding at least a portion of the main pole, wherein the non-magnetic conductive structure is in contact with the spin torque oscillator 
 an underlayer in contact with the main pole and the non-magnetic conductive structure, wherein the field generation layer is disposed on the underlayer; 
 an interlayer disposed between the spin polarization layer and the field generation layer; and 
 a cap layer disposed on the spin polarization layer. 
 
     
     
       7. A magnetic recording head, comprising:
 a main pole; 
 a spin torque oscillator in contact with the main pole, wherein the spin torque oscillator comprises a spin polarization layer and a field generation layer disposed between the spin polarization layer and the main pole, wherein the field generation layer includes a surface at a media facing surface, and the surface includes a first side facing the main pole and a second side facing the spin polarization layer, wherein the first side has a length that is substantially greater than a length of the second side; and 
 a non-magnetic conductive structure surrounding at least a portion of the main pole, wherein the first side of the field generation layer is disposed over at least a portion of the non-magnetic conductive structure. 
 
     
     
       8. The magnetic recording head of  claim 7 , wherein the spin torque oscillator further comprises an underlayer in contact with the main pole and the non-magnetic conductive structure, wherein the field generation layer is disposed on the underlayer. 
     
     
       9. The magnetic recording head of  claim 8 , wherein the underlayer includes a surface at the media facing surface, wherein the surface includes a side in contact with the main pole and the non-magnetic conductive structure. 
     
     
       10. The magnetic recording head of  claim 9 , wherein the side of the underlayer has a length substantially greater than the length of the first side of the field generation layer. 
     
     
       11. The magnetic recording head of  claim 9 , wherein the side of the underlayer has a length substantially the same as the length of the first side of the field generation layer. 
     
     
       12. A data storage device comprising the magnetic recording head of  claim 7 .